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Btrfs: disk-io: replace root args iff only fs_info used

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This is the 3rd independent patch of a larger project to cleanup btrfs's
internal usage of btrfs_root. Many functions take btrfs_root only to
grab the fs_info struct.

By requiring a root these functions cause programmer overhead. That
these functions can accept any valid root is not obvious until
inspection.

This patch reduces the specificity of such functions to accept the
fs_info directly.

These patches can be applied independently and thus are not being
submitted as a patch series. There should be about 26 patches by the
project's completion. Each patch will cleanup between 1 and 34 functions
apiece.  Each patch covers a single file's functions.

This patch affects the following function(s):
  1) csum_tree_block
  2) csum_dirty_buffer
  3) check_tree_block_fsid
  4) btrfs_find_tree_block
  5) clean_tree_block

Signed-off-by: Daniel Dressler <danieru.dressler@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Daniel Dressler
2014-11-21 17:15:07 +09:00
committed by David Sterba
parent a585e94895
commit 01d58472a8
6 changed files with 40 additions and 38 deletions
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8
fs/btrfs/tree-log.c
View File

@@ -2230,7 +2230,8 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
if (trans) {
btrfs_tree_lock(next);
btrfs_set_lock_blocking(next);
clean_tree_block(trans, root, next);
clean_tree_block(trans, root->fs_info,
next);
btrfs_wait_tree_block_writeback(next);
btrfs_tree_unlock(next);
}
@@ -2308,7 +2309,8 @@ static noinline int walk_up_log_tree(struct btrfs_trans_handle *trans,
if (trans) {
btrfs_tree_lock(next);
btrfs_set_lock_blocking(next);
clean_tree_block(trans, root, next);
clean_tree_block(trans, root->fs_info,
next);
btrfs_wait_tree_block_writeback(next);
btrfs_tree_unlock(next);
}
@@ -2384,7 +2386,7 @@ static int walk_log_tree(struct btrfs_trans_handle *trans,
if (trans) {
btrfs_tree_lock(next);
btrfs_set_lock_blocking(next);
clean_tree_block(trans, log, next);
clean_tree_block(trans, log->fs_info, next);
btrfs_wait_tree_block_writeback(next);
btrfs_tree_unlock(next);
}